[gdal-dev] Tiling aerial photos

[Dmitry Baryshnikov]

12.07.2012 14:36, Paul Meems (Top-X) ?????:
> Thanks Even,
>
> http://www.gdal.org/gdalbuildvrt.html does seems very interesting.
> As I understand it, it will do the merging part (without actually 
> merging).
>
> But it doesn't do the tiling part, right? Or is the vrt so optimized 
> tiling is no longer necessary?
>
> Thanks,
>
> Paul
>
>
> 2012/7/12 Even Rouault <even.rouault at mines-paris.org 
> <mailto:even.rouault at mines-paris.org>>
>
>     Selon "Paul Meems (Top-X)" <p.meems at topx-group.nl
>     <mailto:p.meems at topx-group.nl>>:
>
>     > Hi list,
>     >
>     > I have several aerial photos and I use MapWindow GIS to view them.
>     > MapWindow is already using GDAL v1.8
>     >
>     > Instead of loading each aerial photo as an individual layer I
>     want to
>     > create a local tiles store of the photos.
>     > I can then just load the tiles I need based on the scale and
>     view. This
>     > will most likely improve the performance.
>     >
>     > The process will be something like this:
>     > 1. Get the filenames of the photos
>     > 2. Merge them into one
>     > 3. Create tiles
>     > 4. Put the tiles in a SQLite database
>     >
>     > My first question: Is the above suggested process correct or
>     should I do it
>     > differently?
>     > My second question: What GDAL functions should I look into to
>     accomplish my
>     > process?
>
>     You could try to make a VRT from all your photos. It will be seen
>     as a single
>     GDAL dataset, and will take care of the burden of opening the
>     underlying photos
>     when needed. You can use the gdalbuildvrt utility to create the
>     VRT from the
>     photos.
>
>     >
>     > Thanks,
>     >
>     > Paul Meems
>     > The Netherlands
>     >
>
>
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>
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There is an interesting work connected aerial imagery: 
http://trac.osgeo.org/gdal/wiki/Correlator
http://correlatorgsoc2012.blogspot.com/

Best regards,
     Dmitry
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